Battery and battery pack

Abstract

The utility model relates to the technical field of automobiles, particularly provides a battery and a battery pack, and aims to solve the problem of low space utilization rate in the prior art. Therefore, the battery provided by the utility model comprises a shell, a pole assembly and a battery cell assembly accommodated in the shell, the shell comprises a first side wall, the pole assembly is arranged on the first side wall, the pole assembly comprises an insulating part arranged between the first side wall and the battery cell assembly, and the insulating part is arranged on the first side wall. The battery cell assembly is provided with a protruding part, the insulating part is provided with an avoiding groove, and the protruding part is contained in the avoiding groove. The avoiding groove for accommodating the protruding part of the battery cell assembly is formed in the insulating part, so that the overall length of the battery is shortened on the basis of keeping the original length of the battery cell assembly unchanged, and the space utilization rate and the energy density of the battery are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy technology field, concretely provides a battery and battery package. BACKGROUND

[0002] With the aggravation of environmental pollution and the exhaustion of traditional energy, new energy has been fully developed, which includes lithium battery.

[0003] The traditional lithium battery includes a shell, a cell disposed in the shell, a pole disposed on the shell, and an insulating piece disposed on the pole. The insulating piece is between the inner wall of the shell and the cell to play an insulating role. However, the end of the cell opposite to the insulating piece is usually provided with a protruding part, and the surface of the protruding part abutting against the insulating piece is a plane, thereby causing space waste and reducing the energy density, which does not meet the current demand for high energy density of lithium batteries.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the above technical problems, i.e., to solve the problem of improving the space utilization and energy density of the existing.

[0006] In a first aspect, the utility model provides a battery, which includes a shell, a pole assembly, and a cell assembly received in the shell. The shell includes a first side wall, and the pole assembly is disposed on the first side wall. The pole assembly includes an insulating piece disposed between the first side wall and the cell assembly. The cell assembly is provided with a protruding part, the insulating piece is provided with a avoiding slot, and the protruding part is received in the avoiding slot.

[0007] In the above technical solution, the avoiding slot is provided on the insulating piece to receive the protruding part of the cell assembly, thereby shortening the overall length of the battery while maintaining the original length of the cell assembly, to improve the space utilization and energy density of the battery.

[0008] In the preferred technical solution of the above cell, the avoiding slot is provided with two and is respectively disposed at both ends of the insulating piece.

[0009] In the preferred technical solution of the above cell, the insulating piece includes a first baffle, and the first baffle includes the avoiding slot.

[0010] In the preferred technical solution of the above cell, the insulating piece further includes a second baffle disposed on both sides of the first baffle, and the second baffle is fixedly connected with the first baffle.

[0011] In the preferred technical scheme of the above battery cell, the pole post assembly comprises a conductive sheet, the conductive sheet is arranged between the insulating piece and the battery cell assembly, and the tab of the battery cell assembly is connected with the conductive sheet.

[0012] In the preferred technical scheme of the above battery cell, the pole post assembly comprises a conductive post, the insulating piece is provided with a first through hole, the conductive post passes through the first through hole, the first side wall is provided with a second through hole, and the conductive post passes through the second through hole.

[0013] In the preferred technical scheme of the above battery cell, the pole post assembly further comprises a sealing ring, the sealing ring is arranged between the conductive post and the first side wall.

[0014] In the preferred technical scheme of the above battery cell, the pole post assembly further comprises an insulating block and a conductive block arranged outside the shell, the conductive post is fixedly connected with the conductive block, and the insulating block is arranged between the conductive block and the first side wall.

[0015] In the preferred technical scheme of the above battery cell, the pole post assembly further comprises a reinforcing piece arranged between the insulating piece and the first side wall, the reinforcing piece is fixedly connected with the first side wall, the reinforcing piece is provided with a third through hole, and the conductive post passes through the third through hole.

[0016] In a second aspect, the utility model also provides a battery pack, the battery pack comprises the battery of any one of the above. BRIEF DESCRIPTION OF DRAWINGS

[0017] Preferred embodiments of the utility model will be described below with reference to the drawings, in which:

[0018] Figure 1 is a partial structure schematic view of the battery of the utility model;

[0019] Figure 2 is Figure 1 is an explosion view of the battery of the utility model;

[0020] Figure 3 is a perspective view of the insulating piece of the battery of the utility model;

[0021] Figure 4 is Figure 3 is a front view of the insulating piece of the battery provided by the utility model;

[0022] Figure 5 is the insulating piece of the battery of the utility model; Figure 4 is a cooperation schematic view of the insulating piece and the battery cell assembly;

[0023] Figure 6 is Figure 5 is a local enlarged view of part A.

[0024] List of reference signs:

[0025] 100, battery; 1, shell; 11, bottom wall; 12, first side wall; 121, second through hole; 13, second side wall; 2, pole assembly; 21, conductive sheet; 22, conductive column; 23, insulating piece; 231, first through hole; 232, first baffle; 233, second baffle; 234, avoiding groove; 24, sealing ring; 25, insulating block; 26, conductive block; 27, reinforcing piece; 271, third through hole; 3, cell assembly; 31, protrusion. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0027] It should be noted that in the description of the present application, the terms "inner", "outer", "upper", "lower", "top", "bottom", "left", "right", "front", "back" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "provided", "connected", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] In one embodiment, as shown in Figures 1 to 6 The battery 100 of the present application includes a shell 1, a pole assembly 2, and a cell assembly 3 accommodated in the shell 1.

[0030] Preferably, the shell 1 can be a rectangular parallelepiped, or a cylinder or other geometric body, which can be selected and arranged as needed by the user, and is not specifically limited here.

[0031] More preferably, the shell 1 can be an aluminum shell, or a steel shell or made of other materials, which can be selected and arranged as needed by the user, and is not specifically limited here.

[0032] Preferably, the electric core assembly 3 is arranged inside the shell 1, which can be a roll core or a stack core, and the user can select the arrangement according to the need.

[0033] Further preferably, the pole assembly 2 is arranged on the shell 1 and is sealed and insulated with the shell 1 to prevent the transmission of electric energy to the shell 1 and the leakage of electrolyte.

[0034] Further, the pole assembly 2 is electrically connected with the tab of the electric core assembly 3, so as to lead out electric energy to meet the power demand of external power equipment.

[0035] In an embodiment, the shell 1 comprises a first side wall 12, and the pole assembly 2 is arranged on the first side wall 12, as shown in Figure 1

[0036] Preferably, the shell 1 comprises a bottom wall 11, a first side wall 12 arranged at both ends of the bottom wall 11 in a first direction, and a second side wall 13 arranged at both ends of the bottom wall 11 in a second direction, and the first side wall 12 and the second side wall 13 are fixedly connected with the bottom wall 11, preferably integrally formed, so as to not only improve the structural strength, but also simplify the process procedure and improve the efficiency.

[0037] It should be noted that the first direction is the length direction of the bottom wall 11, and the second direction is the width direction of the bottom wall 11, and in other embodiments, the first direction and the second direction can also be the width direction and the length direction of the bottom wall 11, respectively, and the user can arrange them according to the need.

[0038] More preferably, the first side wall 12 is provided with the pole assembly 2 for leading out electric energy, so as to support and fix the pole assembly 2.

[0039] Preferably, the pole assembly 2 can be one, two or more, and the user can arrange them according to the need.

[0040] Further preferably, the pole assembly 2 can be arranged at the center of the first side wall 12, or at one side in the length direction or one side in the width direction of the first side wall 12, and the user can arrange them according to the need.

[0041] Further, one end of the pole assembly 2 extends into the shell 1 and is electrically connected with the electric core assembly 3, and the other end of the pole assembly 2 extends out of the shell 1 to be connected with external power equipment, so as to lead out electric energy to meet the power demand of the external power equipment.

[0042] ​In an embodiment, the pole assembly 2 comprises an insulating member 23 arranged between the first side wall 12 and the battery assembly 3, the battery assembly 3 is provided with a protrusion 31, the insulating member 23 is provided with an avoiding groove 234, and the protrusion 31 is accommodated in the avoiding groove 234, as shown in Figures 1 to 6 .

[0043] Preferably, the insulating member 23 is arranged between the first side wall 12 and the battery assembly 3, thereby insulating the battery assembly 3 and preventing the battery assembly 3 from contacting the first side wall 12 to transmit electric energy to the shell 1.

[0044] More preferably, the protrusion 31 is arranged at an end of the battery assembly 3 opposite to the first side wall 12. The protrusion 31 can be one, two or more, which can be selected by the user as needed, and is not specifically limited herein.

[0045] It should be noted that the battery assembly 3 comprises a battery body, and the battery body comprises a positive plate, a diaphragm and a negative plate arranged in a winding or stacking manner. The battery assembly 3 can further comprise a bracket arranged at an end of the battery body. The bracket is fixed to an end face of the battery body and allows the battery body to pass through the bracket to achieve clamping and fixing of the tab. Therefore, the protrusion 31 can be arranged at the end of the battery body or the bracket, which can be selected by the user as needed, and is not specifically limited herein. In the embodiment, the protrusion 31 is arranged on the bracket.

[0046] It should be further noted that the arrangement of the protrusion 31 can reserve space for the conductive sheet 21, so that the conductive sheet 21 can fully contact the tab. On the other hand, the protrusion 31 cooperates with the avoiding groove 234 to achieve relative fixation and prevent displacement, and the structural stability is more ideal.

[0047] Further preferably, the avoiding groove 234 is arranged at a position of the insulating member 23 opposite to the protrusion 31, thereby reserving space for the protrusion 31. The number of the avoiding grooves 234 is the same as and corresponds to the number of the protrusions 31.

[0048] Further preferably, the shape of the avoiding groove 234 is matched with the shape of the protrusion 31, so that the protrusion 31 can be completely accommodated in the avoiding groove 234, thereby maximizing the space utilization.

[0049] Furthermore, the protrusion 31 is accommodated in the avoiding groove 234, thereby not only improving the space utilization, but also being conducive to preventing the relative fixation of the battery assembly 3 and the pole assembly 2, and the stability is more ideal.

[0050] In an embodiment, the avoiding groove 234 is two and arranged at two ends of the insulating member 23, as shown in Figure 4 .

[0051] Preferably, the two avoiding grooves 234 are arranged at the two ends of the insulation piece 23 in the length direction, so as to accommodate the protruding parts 31 at the two ends and effectively save space.

[0052] More preferably, the avoiding grooves 234 are rectangular, so as to accommodate the rectangular protruding parts 31. In other embodiments, the avoiding grooves 234 can also have other shapes, which can be selected by the user as needed, and are not limited herein.

[0053] Further preferably, the avoiding grooves 234 can also be arranged at the middle position of the insulation piece 23, and the specific position can be selected according to the position of the protruding part 31, which is not limited herein.

[0054] In an embodiment, the insulation piece 23 comprises a first baffle 232, and the first baffle 232 comprises the avoiding grooves 234.

[0055] Preferably, the first baffle 232 is arranged at one side of the insulation piece 23 in the width direction, and the first baffle 232 is fixedly connected with the insulation piece 23, preferably integrally formed, so as to simplify the process and improve the structural stability.

[0056] More preferably, the first baffle 232 is arranged in a bent manner with the insulation piece 23, so as to support the bottom wall 11 of the shell 1 and improve the overall structural strength of the insulation piece 23 and the first baffle 232.

[0057] Further preferably, the included angle between the first baffle 232 and the insulation piece 23 is preferably 90°, and in other embodiments, the included angle can also be other degrees, such as an acute angle, which can be selected by the user as needed, and is not limited herein.

[0058] Further preferably, the avoiding grooves 234 are arranged on the first baffle 232 and close to one end of the first baffle 232 close to the battery cell assembly 3, so as to facilitate the accommodation of the protruding part 31 of the battery cell assembly 3 in the avoiding grooves 234.

[0059] In an embodiment, the insulation piece 23 further comprises a second baffle 233 arranged on both sides of the first baffle 232, and the second baffle 233 is fixedly connected with the first baffle 232.

[0060] Preferably, the two second baffles 233 are arranged at the two sides of the first baffle 232 in the length direction, and also at the two sides of the insulation piece 23 in the length direction, so as to insulate the two sides of the conductive sheet 21.

[0061] More preferably, the second baffle plate 233 is fixedly connected with the insulating member 23 and the first baffle plate 232, preferably integrally formed, so as to not only improve structural stability, but also simplify the process procedure and improve efficiency.

[0062] More preferably, the first baffle plate 232, the insulating member 23 and the second baffle plate 233 enclose a receiving space for receiving the conductive sheet 21, and the conductive sheet 21 is insulated from the shell 1.

[0063] In an embodiment, the pole assembly 2 comprises a conductive sheet 21 arranged between the insulating member 23 and the battery cell assembly 3, and the tab of the battery cell assembly 3 is connected with the conductive sheet 21.

[0064] Preferably, the conductive sheet 21 is flat and arranged between the insulating member 23 and the battery cell assembly 3, so as to be electrically connected with the tab of the battery cell assembly 3.

[0065] More preferably, the conductive sheet 21 can be made of copper material, or made of aluminum material, etc., and the specific material can be set as needed, which is not limited here.

[0066] More preferably, the tab of the battery cell assembly 3 is fixedly connected with the conductive sheet 21 on the end face of the battery cell assembly 3, such as ultrasonic welding, laser welding, etc., so as to realize electrical connection between the two.

[0067] In an embodiment, the pole assembly 2 comprises a conductive column 22, the insulating member 23 is provided with a first through hole 231, the conductive column 22 passes through the first through hole 231, the first side wall 12 is provided with a second through hole 121, and the conductive column 22 passes through the second through hole 121.

[0068] Preferably, the conductive column 22 can be a cylinder, or a cuboid, etc., and the specific shape can be set as needed, which is not limited here.

[0069] More preferably, the conductive column 22 is fixedly connected with the conductive sheet 21, preferably integrally formed, so as to simplify the process procedure and improve structural stability.

[0070] More preferably, the first through hole 231 penetrates through both end faces of the insulating member 23 in the thickness direction, and the first through hole 231 can be circular, or rectangular, or other geometric shapes, etc., and the specific shape can be set as needed, which is not limited here.

[0071] Further preferably, the conductive column 22 passes through the first through hole 231, so as to facilitate the conductive column 22 to pass through the insulating member 23 to extend outside the shell 1.

[0072] Further, the second through hole 121 penetrates the inner and outer surfaces of the shell 1 and is arranged opposite the first through hole 231, preferably, the first through hole 231 communicates with the second through hole 121, thereby facilitating the conductive column 22 to pass through the first through hole 231 and the second through hole 121 in sequence.

[0073] Further, the conductive column 22 passes through the second through hole 121, thereby facilitating the conductive column 22 to extend outside the shell 1 to connect with the external power equipment to meet the power demand thereof.

[0074] In an embodiment, the pole assembly 2 further comprises a sealing ring 24 arranged between the conductive column 22 and the first side wall 12.

[0075] Preferably, the sealing ring 24 can be circular or other geometric shapes, which can be selected by the user as needed, and is not specifically limited herein.

[0076] More preferably, the sealing ring 24 is arranged between the conductive column 22 and the first side wall 12, thereby sealing the gap therebetween to prevent the electrolyte from leaking therefrom.

[0077] Further, the sealing ring 24 is at least partially accommodated in the second through hole 121 and between the conductive column 22 and the inner circumferential surface of the second through hole 121, thereby effectively preventing the electrolyte from leaking from the second through hole 121, and the sealing effect is remarkable.

[0078] In an embodiment, the pole assembly 2 further comprises an insulating block 25 arranged outside the shell 1, and a conductive block 26, the conductive column 22 is fixedly connected with the conductive block 26, and the insulating block 25 is arranged between the conductive block 26 and the first side wall 12.

[0079] Preferably, the conductive block 26 is located outside and opposite the first side wall 12, and the conductive block 26 is provided with a through hole, the end of the conductive column 22 extending out of the shell 1 passes through the through hole of the conductive block 26 and is fixedly connected with the conductive block 26, such as riveting, thereby realizing the fixed connection of the conductive column 22 and the conductive block 26 on the first side wall 12, and the conductive block 26 is convenient for electrically connecting with the external power equipment to lead out the electric energy.

[0080] More preferably, the insulating block 25 is clamped between the conductive block 26 and the first side wall 12, thereby insulating the two from each other to prevent the transmission of electric energy to the shell 1.

[0081] Further preferably, the insulating block 25 is provided with a through hole, so that the conductive column 22 passes through the through hole of the insulating block 25, thereby facilitating the fixed connection with the conductive block 26.

[0082] In an embodiment, the pole assembly 2 further comprises a reinforcing member 27 arranged between the insulating member 23 and the first side wall 12, the reinforcing member 27 being fixedly connected with the first side wall 12, the reinforcing member 27 being provided with a third through hole 271, the conductive pole 22 passing through the third through hole 271.

[0083] Preferably, the reinforcing member 27 is preferably made of a metal material, such as copper or aluminum, etc., thereby playing a role of structural reinforcement for the first side wall 12 to prevent deformation thereof.

[0084] More preferably, the reinforcing member 27 is arranged between the insulating member 23 and the first side wall 12, thereby not only playing a role of supporting and fixing the first side wall 12, but also achieving the insulating arrangement with the battery assembly 3 through the insulating member 23 to prevent electrical contact with the battery assembly 3.

[0085] Still more preferably, the reinforcing member 27 is fixedly connected with the first side wall 12, such as by a laser welding or the like, thereby achieving a stable supporting role for the first side wall 12 to prevent deformation thereof.

[0086] Further preferably, the third through hole 271 penetrates both end faces of the reinforcing member 27 in the thickness direction and is arranged between the first through hole 231 and the second through hole 121, thereby facilitating the conductive pole 22 to pass through in sequence and the conductive pole 22 to extend outside the shell 1.

[0087] Still further, the conductive pole 22 passes through the first through hole 231, the third through hole 271 and the second through hole 121 in sequence until extending outside the shell 1, thereby facilitating connection with an external electrical device to achieve the purpose of leading out electrical energy.

[0088] The utility model also provides a kind of battery pack, and the battery pack includes the battery described in any of the above.

[0089] Those skilled in the art will appreciate that although some embodiments described herein include certain features that are not included in other embodiments, combinations of features of different embodiments are contemplated within the scope of the application and form different embodiments. For example, in the claims of the application, any one of the claimed embodiments can be used in any combination.

[0090] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A battery, characterized in that: The battery includes a shell, a pole assembly, and a cell assembly accommodated in the shell. The shell includes a first side wall. The pole assembly is arranged on the first side wall. The pole assembly includes an insulating member arranged between the first side wall and the cell assembly. The cell assembly is provided with a protrusion. The insulating member is provided with an avoidance groove. The protrusion is accommodated in the avoidance groove.

2. The battery according to claim 1, characterized in that There are two avoidance grooves, which are respectively arranged at two ends of the insulating member.

3. The battery according to claim 1, characterized in that The insulating member includes a first baffle, and the first baffle includes the avoidance groove.

4. The battery according to claim 3, characterized in that The insulating member further includes second baffles arranged on both sides of the first baffle, and the second baffles are fixedly connected to the first baffle.

5. The battery according to claim 4, characterized in that The pole assembly includes a conductive sheet, which is arranged between the insulating member and the battery cell assembly, and the tab of the battery cell assembly is connected to the conductive sheet.

6. The battery according to claim 5, characterized in that The pole assembly includes a conductive column. The insulating member is provided with a first through hole, and the conductive column passes through the first through hole. The first side wall is provided with a second through hole, and the conductive column passes through the second through hole.

7. The method according to claim 6, characterized in that: The pole assembly further includes a sealing ring, which is disposed between the conductive pole and the first side wall.

8. The battery according to claim 7, characterized in that The pole assembly further includes an insulating block and a conductive block disposed outside the shell. The conductive pole is fixedly connected to the conductive block. The insulating block is disposed between the conductive block and the first side wall.

9. The battery according to claim 8, characterized in that The pole assembly further includes a reinforcement member disposed between the insulating member and the first side wall. The reinforcement member is fixedly connected to the first side wall. The reinforcement member is provided with a third through hole, and the conductive column passes through the third through hole.

10. A battery pack, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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